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I have noticed that some duck egg yolks orange while others are yellow. Does that reflect the egg quality? E.g. will dishes made with a dark yolk taste better than the ones with light yolk, or vice versa?

Example of a duck egg with yellow yolk bought in Seattle:

enter image description here

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    Hi, nutrition and health is off-topic here. I removed that part completely from the question and answer, but if health was the only thing you were interested in, we could also close the question, if you prefer.
    – rumtscho
    Jul 24 at 9:23
  • Also, highly related, or maybe it should be considered a duplicate? cooking.stackexchange.com/questions/18759/….
    – rumtscho
    Jul 24 at 9:24
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    Does this answer your question? Yellowness of egg yolk
    – moscafj
    Jul 24 at 9:45

1 Answer 1

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Some duck egg yolks are orange while others are yellow.

Does that reflect the egg quality?

Summary

No

The following applies to poultry eggs in general, not specifically duck eggs.

Where does the colour come from?

Egg yolks get their colour from carotenoids. Carotenoids are plant pigments, responsible for red, orange and yellow hues in certain vegetables and fruits. You might guess then that carrots, pumpkins, peppers, Vietnamese gac fruit, and sweet potatoes are all particularly rich in carotenoids.

But carotenoids are also found in green plant material, because carotenoids absorb light for photosynthesis and protect the plant from sun damage.

What affects the colour?

It depends on what the poultry eats.

There are two classes of carotenoids:

  • Carotenes, which tend to produce reddish colours, and
  • Xanthophylls, which produce yellow shades.

Farmers can adjust yolk colour through the chickens’ diet. Small scale farmers can directly feed plant material naturally high in carotenoids (e.g. algae, alfalfa, citrus peel, fortified corn), while larger-scale farmers rely on processed feed that contains such ground-up plant material or synthetic supplements.

Processed poultry feed is a blend of grain, protein, vitamins and minerals. In Europe, the EU Register of Feed Additives lists which xanthophylls and carotenes can be added. So, a large-scale farmer has to strike the right balance of yellow and red carotenoids to keep the shade consistent. The types and ratios of carotenoids in feed and eggs will depend on what yolk colour consumers want, and farmers provide.

Source: Orange Egg Yolks: Why Are Some Egg Yolks So Orange?

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    In my youth I ived on a chicken farm. We milled and mixed our own feed. The rep talked my dad into trying an additive to make the yolks yellower. They did come out yellower, but we could actually taste it so we didn't do it again.
    – RedSonja
    Jul 25 at 6:58
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    A neighbour here feeds her chickens with home-grown maize, and the yolks come out very yellow. In fact when she makes a cake people comment on the yellowness.
    – RedSonja
    Jul 25 at 6:59
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    My relatives fed chickens and duck orange peel before Easter, to get better colour of the cakes. Worked like a charm, but no change in taste at all.
    – Mołot
    Jul 25 at 11:35

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